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  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
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<body>
  <script>
    var arr = [4, 5, 6, 7, 8, 9];
    console.log(arr.some((item, index, array)=>{
      // console.log('item=' + item + ',index=' + index + ',array=' + array);
      return item > 6;
    }));

    // some函数是 ||

    var arr = [4, 5, 6, 7, 8, 9];
    console.log(arr.every((item, index, array)=>{
      // console.log('item=' + item + ',index=' + index + ',array=' + array);
      return item > 6;
    }));

    // every  &&
  </script>
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